CN115059022B - Method for preventing seepage-proof geomembrane from swelling - Google Patents
Method for preventing seepage-proof geomembrane from swelling Download PDFInfo
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- CN115059022B CN115059022B CN202210547689.4A CN202210547689A CN115059022B CN 115059022 B CN115059022 B CN 115059022B CN 202210547689 A CN202210547689 A CN 202210547689A CN 115059022 B CN115059022 B CN 115059022B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/16—Sealings or joints
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
- E02D31/025—Draining membranes, sheets or fabric specially adapted therefor, e.g. with dimples
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- General Engineering & Computer Science (AREA)
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- Hydrology & Water Resources (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
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Abstract
The invention provides a method for preventing an impermeable geomembrane from swelling, which comprises the steps of paving a cushion layer material at the bottom of a reservoir of a pumped storage power station, paving grid-shaped drainage materials on the surface layer of the cushion layer material, paving an impermeable geomembrane on the surface layers of the cushion layer material and the drainage materials, enabling the impermeable geomembrane to cover the cushion layer material and the drainage materials, installing one-way valves on the impermeable geomembrane, enabling each one-way valve to be detachably fixed at the cross point of the grid-shaped drainage materials, and finally filling backfill on the surface layer of the impermeable geomembrane. The one-way valve provided by the invention can be used for a reservoir bottom anti-seepage geomembrane of a hydropower station, when the underground water pressure is high, the underground water pushes the spring valve body, the spring valve body moves upwards along the conical cavity in the shell to expose the overflow pore canal, the underground water is guided to flow out of the shell along the overflow pore canal, and water flow only overflows from the overflow pore canal, so that the effect of one-way flow of water flow is realized, the anti-seepage geomembrane of the reservoir bottom is prevented from being jacked and damaged when the underground water pressure is high, and the safety of a geomembrane anti-seepage system is ensured.
Description
Technical Field
The invention belongs to the technical field of geomembrane seepage prevention, and particularly relates to a method for preventing seepage-proof geomembranes from swelling.
Background
The new energy wind power, solar energy and the like are rapidly developed, and the mismatch exists between the new energy output peak value and the load peak value, so that the running of a power grid is unstable, and the situation of coexistence of power abandoning and power shortage occurs. In order to eliminate new energy, a matched energy storage facility is needed, and the pumped storage power station is used as a peak regulation power supply, so that the safe and stable operation of a power grid can be ensured, and a large number of pumped storage power stations can be expected to be developed and built.
The geomembrane is widely applied to the bottom seepage prevention of a pumped storage power station by the unique economic competitive advantage, and is used as a main seepage prevention body of a reservoir, and the structural safety of the geomembrane can involve the safety of the whole seepage prevention system. In the actual service process, the groundwater level can rise due to infiltration of rain water in storm or the lifting force is overlarge due to poor drainage of a dam building material at the bottom of the geomembrane; so when reservoir water level fall to the dead water level operating mode, because groundwater pressure is great, prevention of seepage geomembrane can be by the jack-up, leads to the geomembrane structure to break out and loses the prevention of seepage effect, will threaten the infiltration stability of whole reservoir, can not ensure the safe operation of power station.
Disclosure of Invention
The invention aims to provide a method for preventing an impermeable geomembrane from swelling so as to overcome the technical defects.
In order to solve the technical problems, the invention provides a method for preventing an impermeable geomembrane from swelling, which comprises the following steps:
laying bedding materials at the bottom of a reservoir of a pumped storage power station, laying latticed drainage materials on the surface layer of the bedding materials, laying impermeable geomembranes on the surface layers of the bedding materials to enable the impermeable geomembranes to cover the bedding materials and the drainage materials, installing one-way valves on the impermeable geomembranes to enable each one-way valve to be detachably fixed at the crossing points of the latticed drainage materials, and finally filling backfill materials on the surface layers of the impermeable geomembranes.
Further, the one-way valve comprises a shell and a spring valve body, wherein the shell is of a structure with a hollow cavity, a water diversion pore canal is arranged below the hollow cavity, the water diversion pore canal is communicated with the latticed drainage material, and a conical cavity with gradually increased inner diameter is arranged above the water diversion pore canal;
the spring valve body is sealed and sealed in the conical cavity, an overflow pore canal is arranged at the contact position of the spring valve body and the conical cavity, the backfill is positioned below the overflow pore canal, the overflow pore canal is arranged on the shell wall of the shell, and both pore canals are communicated with the outside.
Further, the shell is a hollow columnar body which is opened up and down and is communicated, the hollow cavity is sequentially provided with an upper large cylindrical section, a middle round bench section and a lower small cylindrical section from top to bottom, and a plurality of water inlet channels which are formed on the shell wall of the shell are uniformly distributed around the upper large cylindrical section along the circumferential direction of the upper large cylindrical section;
the overflow pore canals are uniformly distributed around the middle inverted circular truncated cone section along the circumferential direction of the middle inverted circular truncated cone section.
Further, all the overflow channels and all the water inlet channels are uniformly distributed at intervals along the radial direction of the shell, and all the overflow channels and all the water inlet channels are parallel.
Further, a water stop rubber ring sleeved on the outer wall of the spring valve body is arranged at the contact position of the spring valve body and the conical cavity.
Further, the top cover comprises a disc-shaped sealing cover, the circular edge of the sealing cover vertically extends downwards to form an annular flange, the center of the upper surface of the sealing cover vertically extends upwards to form a handheld part, and the top cover is embedded at the top opening end of the upper large cylindrical section of the shell through the annular flange.
When the underground water pressure is higher, the underground water pushes the conical valve core upwards from the water diversion pore canal through the impermeable geomembrane, the conical valve core moves upwards along the conical cavity in the shell to expose the overflow pore canal, the underground water flows out of the shell along the overflow pore canal, the underground water at the lower part of the impermeable geomembrane is discharged, and partial underground water pressure is released;
when the water level of the backfill rises to the position of the water inlet channel, water enters the shell from the water inlet channel, water pressure acts on the conical valve core, and the conical valve core moves downwards along the conical cavity in the shell, so that the conical valve core is tightly attached in the conical cavity, and water flow is prevented from flowing downwards.
The beneficial effects of the invention are as follows:
the one-way valve provided by the invention can be used for a reservoir bottom anti-seepage geomembrane of a hydropower station, when the underground water pressure is high, the underground water pushes the spring valve body, the spring valve body moves upwards along the conical cavity in the shell to expose the overflow pore canal, the underground water is guided to flow out of the shell along the overflow pore canal, water flow only overflows from the overflow pore canal, the effect of one-way flow of water flow is realized, the anti-seepage geomembrane of the reservoir bottom is prevented from being jacked and damaged when the underground water pressure is high, and the safety of a geomembrane anti-seepage system is ensured.
In order to make the above-mentioned objects of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
FIG. 1 is a schematic illustration of an application of an impermeable geomembrane;
FIG. 2 is a plan view of an impermeable geomembrane;
FIG. 3 is a schematic diagram of the structure of the check valve (arrows show the water flow direction);
FIG. 4 is an exploded schematic view of a spring valve body;
FIG. 5 is a schematic structural view of the housing;
reference numerals illustrate:
1. a spring valve body; 101. a top cover; 102. a compression spring; 103. a conical valve core; 104. a water passing hole;
2. a housing; 201. a water diversion duct; 202. a conical cavity; 203. an overflow channel; 204. a water inlet duct;
3. draining material;
4. a one-way valve;
5. backfilling;
6. an impermeable geomembrane;
7. and (5) bedding materials.
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present invention with specific examples.
In the present invention, the upper, lower, left and right in the drawings are regarded as the upper, lower, left and right of the method for preventing swelling of an impermeable geomembrane described in the present specification.
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the examples described herein, which are provided to fully and completely disclose the present invention and fully convey the scope of the invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, like elements/components are referred to by like reference numerals.
Unless otherwise indicated, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. In addition, it will be understood that terms defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
The embodiment relates to a method for preventing an impermeable geomembrane from swelling, which comprises the following steps:
referring to fig. 1 and 2, a bedding material 7 is laid at the bottom of a reservoir of a pumped storage power station, a latticed drainage material 3 is laid on the surface layer of the bedding material 7, an impermeable geomembrane 6 is laid on the surface layers of the bedding material 7, the bedding material 7 and the drainage material 3 are covered by the impermeable geomembrane 6, then a one-way valve 4 is installed on the impermeable geomembrane 6, each one-way valve 4 is detachably fixed at the intersection point of the latticed drainage material 3, and finally backfill 5 is filled on the surface layer of the impermeable geomembrane 6.
The impermeable geomembrane 6 is used for impermeable of the reservoir bottom of the hydropower station, and generally adopts two cloth-one membrane:
geotextile (500 g/m) 2 ) +1.50mm thick HDPE geomembrane+geotextile (500 g/m 2 )。
The cushion material 7 is in line with the requirement of the industry standard DL/T5016-2011 'concrete face rockfill dam design Specification', and can be 0.5-1 m thick, and the permeability coefficient is preferably 1 multiplied by 10 -3 cm/s～1×10 -2 cm/s。
The drainage material 3 consists of graded broken stone and geotextile, and is arranged at the bottom of the impermeable geomembrane 6 and the surface part of the filling layer of the cushion material 7, and the graded broken stone is used for wrapping the geotextile such as geotextile for reverse filtration so as to prevent the fine material from entering the drainage material 3 to be blocked. The graded broken stone material meets the requirements of the industry standard DL/T5016-2011 'concrete face rockfill dam design Specification', the section size is square, the side length is generally 20-30 cm, and the permeability coefficient is preferably not less than 1X 10 -1 cm/s。
The interval between the drainage materials 3 on the plane arrangement is 2-4 m.
The backfill 5 is filled above the impermeable geomembrane 6 to play a role of pressing the impermeable geomembrane 6, and the thickness is generally 20-30 cm.
Referring to fig. 3, the one-way valve 4 includes a housing 2 and a spring valve body 1, wherein the housing 2 has a hollow cavity structure, a water diversion channel 201 is provided below the hollow cavity, the water diversion channel 201 is communicated with a latticed drainage material 3, a conical cavity 202 with gradually increased inner diameter is provided above the water diversion channel 201, as shown in fig. 5, the spring valve body 1 is sealed and sealed in the conical cavity 202, an overflow channel 203 is provided at the contact position of the two, and a backfill 5 is positioned below the overflow channel 203.
The principle or process of operation of the non-return valve 4 is as follows:
when the underground water pressure is high, the underground water pushes the spring valve body 1 upwards from the water diversion pore canal 201 through the impermeable geomembrane 6, the spring valve body 1 moves upwards along the conical cavity 202 in the shell 2 to expose the water overflow pore canal 203, and the underground water flows out of the shell 2 along the water overflow pore canal 203, and because the water overflow pore canal 203 is shielded and sealed by the spring valve body 1 under normal conditions, referring to fig. 3, the water can only push the water overflow pore canal 203 to be exposed when the water pressure is high, and therefore, water flow can only overflow from the water overflow pore canal 203.
The overflow channel 203 is formed on the wall of the casing 2, and both channels (referred to as a water diversion channel 201 and an overflow channel 203) are communicated with the outside.
The function of the water-diverting duct 201 is to direct the flow of water into, and therefore the open end of the water-diverting duct 201 is through the impermeable geomembrane 6.
Referring to fig. 3 and 4, the spring valve body 1 at least includes a top cover 101, a compression spring 102 and a conical valve core 103 which are sequentially connected from top to bottom, wherein the top end of the compression spring 102 is fixedly connected to the lower surface of the top cover 101, and the bottom end of the compression spring 102 is fixedly connected to the upper end of the conical valve core 103, wherein the top cover 101 and the conical valve core 103 are separated by the compression spring 102 at a distance and are not in contact with each other.
The compression spring 102 is a compression spring with rust prevention requirements, and provides a certain amount of elastic force for the conical valve core 103.
The cone valve core 103 is in a closed hollow inverted cone shape, and a water passing hole 104 is formed in the bottom surface of the inverted cone.
Specifically, the cone-shaped valve core 103 is provided with a water passing hole 104 at the top of the closed inverted cone.
The cone-shaped valve core 103 is sealed and sealed in the cone-shaped cavity 202, and under the action of water pressure, the cone-shaped valve core 103 can slide up and down in the cone-shaped cavity 202 so as to open and expose or close the shielding overflow hole 203.
As shown in fig. 5, the casing 2 is a hollow cylindrical body with an upper opening and a lower opening and a through hole, and the hollow cavity is sequentially provided with an upper large cylindrical section, a middle round bench section and a lower small cylindrical section from top to bottom, wherein the diameter of the upper large cylindrical section is larger than that of the lower small cylindrical section, and the middle round bench section is a conical cavity 202 or the middle round bench section is used as the cavity wall of the conical cavity 202.
A plurality of water inlet channels 204 formed in the wall of the housing 2 are uniformly distributed around the upper large cylindrical section along the circumferential direction thereof.
Specifically, one end opening of all the water inlet channels 204 faces the conical cavity 202, and the other end opening faces the outside of the casing 2, that is, the water inlet channels 204 communicate the conical cavity 202 with the outside of the casing 2, when the outside water of the casing 2 is more, the water flows into the conical cavity 202 from the water inlet channels 204, the water pressure acts on the top surface of the conical valve core 103, the conical valve core 103 moves down along the conical cavity 202 until the overflow channel 203 is closed, and at this time, the water flow is trapped in the conical cavity 202 and cannot continue to move down again, so that the unidirectional flow function of the unidirectional valve 4 is realized.
The plurality of overflow holes 203 are uniformly distributed around the middle inverted circular truncated cone section along the circumferential direction thereof.
Since the outflow and inflow of water are all from all directions, all the overflow holes 203 and all the water inlet holes 204 are uniformly spaced along the radial direction of the housing 2, and all the overflow holes 203 and all the water inlet holes 204 are parallel to each other in order to ensure the inflow or the discharge of the water flow in the whole range as much as possible.
The housing 2 may be made of plastic material or corrosion resistant steel.
A water-stop rubber ring sleeved on the outer wall of the spring valve body 1 is arranged at the contact position of the spring valve body 1 and the conical cavity 202.
Specifically, the water-stop rubber ring is sleeved on the conical valve core 103 at the contact position of the conical valve core 103 and the conical cavity 202.
The cone-shaped valve core 103 is made of plastic, and can be pressed more and more tightly in the cone-shaped cavity 202 of the outer shell 2 under the action of upper water pressure, so that the water stopping effect is achieved.
As shown in fig. 4, the top cover 101 includes a circular-disk-shaped cover, the circular edge of which extends vertically downward to form an annular flange, and the center of the upper surface of which extends vertically upward to form a hand-held portion, wherein the top cover 101 is fitted over the top open end of the upper large cylindrical section of the housing 2 via the annular flange.
The top cover 101 is circular, can be freely detached or installed on the outer shell 2 in a threaded or movable buckle mode, and achieves the effect of repairing the inner spring valve body 1, and the top cover 101 can be made of plastic materials or anti-corrosion steel materials.
The specific application of the non-return valve 4 is as follows:
paving a bedding material 7 at the bottom of a reservoir of a pumped storage power station, paving grid-shaped drainage materials 3 on the surface part of a filling layer of the bedding material 7, paving anti-seepage geomembranes 6 on the surfaces of the bedding material 7, and then installing one-way valves 4 on the anti-seepage geomembranes 6, so that each one-way valve 4 is detachably fixed at the cross point of the grid-shaped drainage materials 3, for example, the bottom flange of a shell 2 of the one-way valve 4 is adhered to the anti-seepage geomembranes 6, a water diversion pore canal 201 is connected with the grid-shaped drainage materials 3, and then backfilling materials 5 are filled on the surface layer of the anti-seepage geomembranes 6, so that the overflow pore canal 203 of the one-way valve 4 and the backfilling materials 5 exposed above are ensured, namely, the non-burying materials 5 are not buried.
On the basis, when the underground water pressure is higher, the underground water pushes the conical valve core 103 upwards from the water diversion pore canal 201 through the impermeable geomembrane 6, the conical valve core 103 moves upwards along the conical cavity 202 in the shell 2 to expose the overflow pore canal 203, the underground water flows out of the shell 2 along the overflow pore canal 203, the underground water at the lower part of the impermeable geomembrane 6 is discharged, and part of the underground water pressure is released;
when the water level of the backfill 5 rises to the position of the water inlet channel 204, water enters the housing 2 from the water inlet channel 204, water pressure acts on the conical valve core 103, and the conical valve core 103 moves downwards along the conical cavity 202 in the housing 2, so that the conical valve core 103 is tightly attached in the conical cavity 202, and water flow is prevented from flowing downwards.
Specifically, the open end of the penstock 201 extends through the geomembrane into or deep into the drainage material.
In order to increase the contact area between the bottom of the casing 2 and the drainage material and increase the friction force and improve the stability when being flushed by water flow, as shown in fig. 3 and 5, the bottom surface of the casing 2 extends radially to form an annular flange, and the flange can be inserted into the drainage material and should be adhered and fixed on the geomembrane.
In the present invention, the check valve 4 has a function of unidirectional flowing water, is arranged at the cross of the drain 3 (see fig. 1) on the plane, the bottom protruding outer ring of the check valve 4 should be tightly connected with the impermeable geomembrane 6, and the length L1 of the lower part of the housing 2 of the check valve 4 should be the same as the thickness of the backfill 5.
The working principle of the one-way valve 4 provided by the invention is as follows:
upper force: f (F) Upper part ＝G+F1+F2
G is the dead weight of the cone-shaped valve core 103;
f1 is the elastic force provided by the compression spring 102;
f2 is the upper water pressure, i.e. the water pressure of the water flow entering the housing 2 from the water inlet channel 204 acting on the conical valve core 103;
lower force: f (F) Lower part(s) ＝F3
F3 is the lower water pressure, i.e. the water pressure from the water flow in the water diversion tunnel 201 acting on the cone valve core 103;
when F Upper part >＝F Lower part(s) When the conical valve core 103 is pressed against the conical cavity 202, water does not flow from the upper part to the lower part.
When F Upper part <F Lower part(s) When the cone valve core 103 is separated from the cone cavity 202, water flows fromThe lower part flows to the upper part, and the groundwater is released.
The condition that the impermeable geomembrane 6 does not bulge in the invention is as follows:
upper unit area stress: p (P) Upper part ＝γ’ Soil H Soil +γ Water and its preparation method H On water
Lower unit area stress: p (P) Lower part(s) ＝γ Water and its preparation method H Underwater water
P Upper part >P Lower part(s)
γ’ Soil The floating volume weight of the backfill 5;
γ water and its preparation method Is the volume weight of water;
H soil Is the thickness of the backfill 5;
H on water The water head at the upper part of the impermeable geomembrane 6, namely the water depth between the reservoir water level and the impermeable geomembrane 6;
H underwater water The water head at the lower part of the impermeable geomembrane 6, namely the groundwater level is higher than the numerical value of the impermeable geomembrane 6.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of implementations of the invention and that various changes in form and details may be made therein for practical use without departing from the spirit and scope of the invention.
Claims (5)
1. A method of preventing ballooning of an impermeable geomembrane comprising the steps of:
paving a bedding material (7) at the bottom of a reservoir of a pumped storage power station, paving a latticed drainage material (3) on the surface layer of the bedding material (7), paving an impermeable geomembrane (6) on the surface layers of the bedding material (7) and the drainage material (3), enabling the impermeable geomembrane (6) to cover the bedding material (7) and the drainage material (3), installing a one-way valve (4) on the impermeable geomembrane (6), enabling each one-way valve (4) to be detachably fixed at the cross point of the latticed drainage material (3), and finally filling backfilling materials (5) on the surface layer of the impermeable geomembrane (6);
the one-way valve (4) comprises a shell (2) and a spring valve body (1), wherein the shell (2) is of a hollow cavity structure, a water diversion pore canal (201) is formed below the hollow cavity, the water diversion pore canal (201) is communicated with a latticed drainage material (3), and a conical cavity (202) with the inner diameter gradually increased is formed above the water diversion pore canal (201);
the spring valve body (1) is sealed and sealed in the conical cavity (202), an overflow pore canal (203) is formed at the contact position of the spring valve body and the conical cavity, the backfill material (5) is positioned below the overflow pore canal (203), the overflow pore canal (203) is formed in the shell wall of the shell (2), and the two pore canals are communicated with the outside;
the spring valve body (1) at least comprises a top cover (101), a compression spring (102) and a conical valve core (103) which are sequentially connected from top to bottom, the conical valve core (103) is in a hollow inverted conical shape, and a water passing hole (104) is formed in the bottom surface of the inverted cone;
wherein, the cone valve core (103) is sealed and sealed in the cone cavity (202);
the shell (2) is a hollow columnar body which is opened up and down and is communicated with the shell, the hollow cavity is sequentially provided with an upper large cylindrical section, a middle round bench section and a lower small cylindrical section from top to bottom, and a plurality of water inlet channels (204) which are formed on the shell wall of the shell (2) are uniformly distributed around the upper large cylindrical section along the circumferential direction of the upper large cylindrical section;
the overflow holes (203) are uniformly distributed around the middle inverted circular truncated cone section along the circumferential direction.
2. A method of preventing ballooning in an impermeable geomembrane according to claim 1, wherein all the spillway tunnels (203) and all the water intake tunnels (204) are evenly spaced along the radial direction of the casing (2) and all the spillway tunnels (203) and all the water intake tunnels (204) are parallel to each other.
3. A method for preventing bulge of impermeable geomembrane according to claim 1, wherein a water stop rubber ring sleeved on the outer wall of the spring valve body (1) is arranged at the contact position of the spring valve body (1) and the conical cavity (202).
4. A method of preventing ballooning in an impermeable geomembrane according to claim 1, wherein the top cover (101) comprises a disc-shaped cover, the circular edge of the cover extending vertically downwardly to form an annular flange, the centre of the upper surface of the cover extending vertically upwardly to form a hand-held portion, wherein the top cover (101) is fitted over the annular flange at the top open end of the upper large cylindrical section of the housing (2).
5. The method for preventing swelling of an impermeable geomembrane according to claim 4, wherein when the pressure of the groundwater rises, the groundwater pushes the cone-shaped valve core (103) upwards from the water diversion tunnel (201) through the impermeable geomembrane (6), the cone-shaped valve core (103) moves upwards along the cone-shaped cavity (202) in the shell (2) to expose the water overflow tunnel (203), the groundwater flows out of the shell (2) along the water overflow tunnel (203), and the groundwater at the lower part of the impermeable geomembrane (6) is discharged to release partial groundwater pressure;
when the water level of the backfill (5) rises to the position of the water inlet channel (204), water enters the shell (2) from the water inlet channel (204), water pressure acts on the conical valve core (103), and the conical valve core (103) moves downwards along the conical cavity (202) in the shell (2), so that the conical valve core (103) is tightly attached in the conical cavity (202) to prevent water flow downwards.
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| CN202210547689.4A CN115059022B (en) | 2022-05-18 | 2022-05-18 | Method for preventing seepage-proof geomembrane from swelling |
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| DE3632951A1 (en) * | 1986-09-27 | 1988-03-31 | Dynamit Nobel Ag | FLEXIBLE SEALING COATING |
| CN201560420U (en) * | 2009-11-13 | 2010-08-25 | 济南大学 | Geomembrane |
| KR101641050B1 (en) * | 2015-08-17 | 2016-07-20 | 박인구 | Drainage plate for bottom of underground |
| KR101684235B1 (en) * | 2016-02-05 | 2016-12-07 | (주) 수향방수 | Composite waterproof sheet with mesh felt and Method of menufacturing Composite waterproof sheet with mesh felt and Construction method of composite waterproof sheet with mesh felt |
| EP3708357A1 (en) * | 2019-03-15 | 2020-09-16 | Naue GmbH & Co. KG | Geomaterial strip with biological degradation characteristics |
| CN112112678A (en) * | 2020-09-07 | 2020-12-22 | 中铁武汉勘察设计研究院有限公司 | Anchor rod with side wings and provided with check valve and used for extruding soil body |
-
2022
- 2022-05-18 CN CN202210547689.4A patent/CN115059022B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3632951A1 (en) * | 1986-09-27 | 1988-03-31 | Dynamit Nobel Ag | FLEXIBLE SEALING COATING |
| CN201560420U (en) * | 2009-11-13 | 2010-08-25 | 济南大学 | Geomembrane |
| KR101641050B1 (en) * | 2015-08-17 | 2016-07-20 | 박인구 | Drainage plate for bottom of underground |
| KR101684235B1 (en) * | 2016-02-05 | 2016-12-07 | (주) 수향방수 | Composite waterproof sheet with mesh felt and Method of menufacturing Composite waterproof sheet with mesh felt and Construction method of composite waterproof sheet with mesh felt |
| EP3708357A1 (en) * | 2019-03-15 | 2020-09-16 | Naue GmbH & Co. KG | Geomaterial strip with biological degradation characteristics |
| CN112112678A (en) * | 2020-09-07 | 2020-12-22 | 中铁武汉勘察设计研究院有限公司 | Anchor rod with side wings and provided with check valve and used for extruding soil body |
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| CN115059022A (en) | 2022-09-16 |
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